Smart glass, also called switchable glass or privacy glass, is a new building decoration material that combines the smart film with glass. The laminated smart glass is an innovative opto-electrical laminated glass that composed of two layers of toughened glass on the outer side, smart film in the middle and other composite materials to form a sandwich-like structure. All those materials stick together firmly through special lamination process. When power off, it is opaque；when power on, it turns transparent instantaneously.